5/24/10
Check out the next comparison, this time with the Sony Carl Zeiss 24-70mm and the Sony 28mm F/2.8 at 28mm (of course).
The Sony CZ zoom looks sharper in the centers at wide apertures. The mid areas, (or approximately the APS-C corner areas) are easily sharper at all apertures with the Sony CZ zoom. The extreme corners are sharper with the Sony 28mm from F/2.8-5.6. Distortion is less with the CZ zoom. Ghosting is much better controlled with the Sony 28mm at all apertures.